Royal Mail says customers ‘should never’ write two things on letters and parcels

Brits have been warned against making a simple mistake with their postThink twice before posting that letter or parcel(Image: Anna Bryukhanova)A comma after a street name might seem harmless at first, particularly for anyone used to writing addresses in a sentences. But Royal Mail are not fans when punctuation like commas and full stops are used on letters and parcels.